How to store a new variable based on a range from another column?

I have a .txt file with 2 columns (X,Y).

I would like to create a variable that represents a range of Y, but have that range based on a range of X that I select.

For example:

X = [-10, -8, -6, -4, -2, 0, 2, 4, 6, 8, 10]

Y = [-10, -9, -8, -7, -6, 0, 6, 7, 8, 9, 10]

Now I want Variable Y_a to be a range of y, thats dependant on X.

For example, if i want Y_a to be all of the y values that are equal to or greater than x = -4 it would be:

Y_a = -7, -6, 0, 6, 7, 8, 9, 10

If i want Y_a to be equal to Y numbers when x is less than -2 it would be:

Y_a = -10, -9, -8, -7

Does that make sense?

[Andrew Lackey]

For example I am trying to run this code:

Y_a = Y(X==[0:1]);

Can I use an ==(range)?

Answer 1

[Matt J]

X = [-10, -8, -6, -4, -2, 0, 2, 4, 6, 8, 10];
Y = [-10, -9, -8, -7, -6, 0, 6, 7, 8, 9, 10];

Y_a=Y(-4<=X & X<=8)

Y_a = 1×7

-7 -6 0 6 7 8 9

[Andrew Lackey]

Thank you so much! That works